About: http://webisa.webdatacommons.org/143859530

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	After nearly a month of debugging effort, I still cannot give a definitive answer to the problem, but there is a workaround.
http://www.w3.org/ns/prov#wasQuotedFrom	serverfault.com